Types of Chemical Reactions

What you will know after the next two class periods You will be able to identify a combustion reaction You will be able to identify a double replacement reaction You will be able to identify a single replacement reaction You will be able to identify a synthesis reaction You will be able to identify a decomposition reaction You will be able to balance all of these chemical reactions You will have a greater appreciation for the power of some simple chemicals

5 Major Rxn Types 5 types of reactions

Combustion Reaction Some type of hydrocarbon (fuel) + O > CO 2 + H 2 O + heat C 3 H 8 O (l) + O 2(g) > CO 2(g) + H 2 O (l) + heat Isopropyl alcohol 2 C 3 H 8 O (l) + 9 O 2(g) > 6 CO 2(g) + 8 H 2 O (l) Molar mass = 60 g/mol60 g 1 mole of IPA

Double Replacement Reaction AB + CD > AD + CB Pb(NO 3 ) 2(aq) + KI (aq) > PbI 2(s) + KNO 3(aq) Pb(NO 3 ) 2(aq) + 2 KI (aq) > PbI 2(s) + 2 KNO 3(aq)

Single Replacement Reaction (Displacement Rxn) A + BC > AC + B Zn (s) + HCl (aq) > ZnCl 2(aq) + H 2(g) + heat Zn (s) + 2 HCl (aq) > ZnCl 2(aq) + H 2(g) + heat

How Can We Tell If A Single Replacement Reaction Will Occur? A (metal) + BC > AC + B Zn (s) + 2 HCl (aq) > ZnCl 2(g) + H 2(g) Table similar to this on page 333 of your textbook

Synthesis Reaction A + B > AB H 2(g) + O 2(g) > H 2 O (g) + lots of heat 2H 2(g) + O 2(g) > 2H 2 O (g) + lots of heat

Decomposition Reaction AB > A + B ABC > AB + C ABC > A + B + C

Decomposition Reaction

Decomposition Reaction The Catalyst Yogi

Decomposition Reaction AB > A + B KClO 3(s) > KCl (s) + O 2(g) ABC > AB + C 2 KClO 3(s) > 2 KCl (s) + 3 O 2(g)